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I have a Barnard P Action with a couple of hundred rounds through it that gives a very delicate primer strike. I use CCI BR LR primers which are fairly hard but I would expect a deeper impact.

I have had 22 misfires where the primer is struck but has not fired, popping the primers out and clouting them with a hammer set them off so the primers were not defective in that respect. I was fire forming at the time so in theory the case could move forward slightly but I had built them with a long COAL so the bullet had a 5 thou jam which in theory should keep the case in place and it is not exactly rattling around in the chamber either. (It is a 7mm SAUM wildcat with steeper shoulders)

I always back the knurled screw off and take the tension off the firing pin spring when not in use so the spring should be fine so next move is to measure the firing pin protrusion, can anyone tell me what it should be and if it can be adjusted?

Chamber cut properly?

Robin128 wrote:Chamber cut properly?

The chamber was cut by a person I consider to be the finest chamber cutter in the UK so it should be more than OK. I have stuffed an endoscope up it a few times and the chamber is very nice.

I'm the wrong one to comment maybe...but isn't it all about head spacing?

I'm thinking that the cartdridge is not close enough to the bolt face??

I know it's different between rim and rimless. But I had a Winchester 30/30 underlever :P that kept misfiring...even on new brass/factory ammo..I changed everything, firing pin, springs etc to no avail.

If I were you, get the man to have a look at it.

Edit,,,Did you specify the wildcat chamber properly???

Are you sure it's not just a bit of crap worked itself into the firing pin spring and slowing it down?

what lot numbers are the primers dave as danny is having exactly the same probs with some using bioth a nesika and stolle action

spud wrote:what lot numbers are the primers dave as danny is having exactly the same probs with some using bioth a nesika and stolle action

I will have a check and post the lot numberMark, has Danny tried popping a 'fired' primer and whacking it with a hammer to see if it went bang?

Doesn't light strike say more about the rifle than the primers?

If I remember correctly one of the guys I was talking too at Blair the other week had issues with the firing pin wearing out very quickly :shock:

I would ping MikMak and ask him because I think he fitted a new pin.

Alan

Robin128 wrote:Doesn't light strike say more about the rifle than the primers?

I tend to agree. That's not to say you don't get bad primers, far from it. But in the numbers Dave is talking about, in excess of 22, I'd say the rifle needs looking at......